Groovy overloaded operator

Groovy overloaded operator (bit shift on objects)

This example come from "Groovy Goodness Notebook".

Clone repo:

git clone https://github.com/piotrpietrzak/gatchaman.git

Switch to branch:

git checkout origin/groovy/multiple_overloaded_operator_methods

Test in spock is quite interesting:

def "should add operation for user" () {
    setup:
    Priviledge priviledge = new Priviledge()
    User user = new User(name: 'Test name')
    Operation operation = new Operation(name: 'Test operation')

    when:
    priviledge << user << operation

    then:
    priviledge.users.contains user
    priviledge.operations.contains operation
}